/Engine/Source/Editor/WorldPartitionEditor/Public/WorldPartition/ContentBundle/Outliner/ContentBundleHierarchy.h
Find or optionally create a parent item for a given tree item
virtual FSceneOutlinerTreeItemPtr FindOrCreateParentItem ( const [ISceneOutlinerTreeItem](API\Editor\SceneOutliner\ISceneOutlinerTreeItem) & Item, const [TMap](API\Runtime\Core\Containers\TMap)< [FSceneOutlinerTreeItemID](API\Editor\SceneOutliner\FSceneOutlinerTreeItemID), FSceneOutlinerTreeItemPtr > & Items, bool bCreate )